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(No Model.) 2 Sheets Sheet 1 V. W. BLANGHARD.

TYPE WRITING MACHINE.

No. 373,637. Patented Nov. 22, 1887.

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'2 Sheets-Sheet 2.

(No Model.)

v. W. BLANOHA I). TYPE WRITING MACHINE.

Patented Nov." 22, 1887.

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UNITED TATES ATENT Fries.

VIRGIL W. BLANGHARD, OF NE\V YORK, N. Y., ASSIGNOR TO 0. GODFREYPATTERSON, OF SAME PLACE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 373,637, dated November22, 1887.

Application filed January 2, 1886. Serial No. 187,439. (No model.)

To aZZ whom it may concern.-

Be it known that I, VIRGIL W. BLANCH- ARD, of New York, in the county ofNew York and State of New York, have invented certain new and usefulImprovements in Type- VVriting Machines; and I do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form part of this specification, in which Figure 1is a perspective view of a portion of a typewriter embodying myinvention. Fig. 2 is aplan View, partlyin section, of one of thekey-plates. Fig. 3 is a vertical section of a portion of the machine.Figs. 4 and 5 are details.

This invention relates to improvements in type-writing machines,pertaining especially to the mechanism by means of which thetype-cylinder is rotated; and it consists in the construction and novelarrangement of the parts, hereinafter described, and pointed out in theappended claims.

In a type-writer whose automatic mechanism is operated by means ofcollared keystems acting on counterpoised pivoted keyplates it ispreferable to revolve the type-cylinder by a single key-plate, as willbe hereinafter described.

Referring to the accompanying drawings by letter, A designates the frameof the typewriter, having the vertical pillar A rising from the rearedge of the same.

B is a cylinder, the shaft 1) of which turns in proper bearings madeupon the upper end of the pillar A. If preferred, the cylinder may notbe made complete, but may be only a segment, as shown in Fig. 4. Thecylinder 0 has raised letters upon its removable shell at properintervals, which letters correspond to those on the keys, hereinafterdescribed.

Each key moves the cylinder a proper distance for the lettercorresponding to that upon 5 its head to be in proper position formaking an impression.

b is a pinion on the inner or front end of the shaft 12, and turning thesaid shaft by its rotation.

O is a segmental rack, made on the arc of a circle the center of whichlies in the axis of the shaft 0 of said rack. The rack O engages withthe pinion b, and thereby turns the shaft 1).

c and c are diametricallyopposite arms of 3 the frame of the rack O. Theend of the arm 0 has connected to itthe upper end of a spring, 0 thelower end of which is connected to a proper point of the frame of themachine. The end of the arm 0 has pivoted to it the upper end of alink-bar, c", the lower end of which is pivoted to the hinge-piece (Z ofa compositejoint', D. The piece (I has an upward extension, upon whichthe lower end of the link-bar c is pivoted, so that the said bar can 6turn laterally with reference to the machine. The lower part of thepiece (1 is recessed vertically at d, and on each side of the recess hasbearings (1 made in it for the reception of the in d, which runs througha knuckle or o upward extension, d, on the end of an arm, d extendingfrom the center of the rear edge of the key-plate, hereinafterdescribed.

E is the key-plate, preferably of rectangular form, and having the frontedge, e, enlarged and bored at its ends to receive the conepoints 0, theouter ends of which pivot in uprights or standards 0", rising from theframe of the machine.

e is a rectangular opening madein the keyplate E and running from itsfront edge, e, rearward.

e e are perforations arranged in transverse lines in the key-plate E,the perforations in each line being preferably equidistant, and thelines of perforations also preferably equidistan t.

X is a lever having its inward end, 00, pivoted in a bracket, or,secured to the edge of the opening 0, having its middle portion pivooted at m on a depending arm from the frame of'the machine, and havingon its outer arm the sliding weight Y, which may be fixed in position onthe lever by a screw, 3/.

F is a key-board adapted to have lines of keys F, each of which linesstands over and corresponds in position with a line of perforations, 6*,in the key-plate. All of the keys Fare of similar construction, exceptthat the collars f are at difi'erent heights on the key-stems, ICO

and only a sufficient number of keys are shown to enable the operationof the machine to. be understood,

fis a transverse bar of the main frame of the machine, and ff arevertical openings therethrough. Through each opening f passes the stem fof a key F, and surrounding the said stem above the bar f, and betweenthe same and the headf of the key, is the coiled spring f. The stem f ofthe key passes through a perforation e of the key-plate and is guidedthereby.

f" is a collar on the stemf, which collar strikes against the undersurface of the barf and limits the motion of the key upward. The stem fis provided with a lower collar, f which strikes against the uppersurface of the'key-plate and depresses the same when the key isdepressed.

The operation of the machine is as follows: The stems f of all the keysF in the complete machine pass through the key-plate F, as described,and the collars f on the several keystems are arranged at varyingdistances above the plate F, or so that they will impinge against thisplate at different points of movement of .said stems, which all have thesaine amount of vertical play, so that a different amount of impulse ordepression will be given plate F by the keys corresponding to thevarious charactersin a row on the type-cylinder. Now,it is obvious thatif varying movements are imparted to plate F, as described, it will,through its connections, oscillate segmental rack 0 through a greater orless are on its shaft 0 and the rack will impart a greater or lessrotatory movement to the type-cylinder, so that different characterswill be brought uppermost or. into printing position. Then, if one stemf has its collar f set to impart only a very slight degree of movementto plate F, the type-cylinder B will, through its connections with saidplate, have but a slight partial rotation imparted to it-enough to bringthe first character in a row on its face into printing position. Then,if another collared key-stem is arranged to give a full amount ofmovement toplate F, the type-cylinder B will be sufficiently rotated tobring the last character in the row into printing position, so that itis obvious by properly adjusting the collars on the several stems of thebank of keysI can impart only a proper and required degree of movementto plate F and type-cylinder B to bring the proper character on saidcylinder corresponding to the depressed keyinto printing position. Uponthe release of each key the plate F is returned to its normal positionby the described means, and thereby the typecylinder is also returned toits zero or normal position, the return of the latter being expedited bythe spring a g H is a block of rubber, leather, or other suitablematerial secured to a' stud on the main frame of the machine. Aset-screw, h, engages in a threaded opening in the arm h of thesegmental rack O, and its point can be brought into contact with thesaid block of elastic material, so as to adjust the type-cylinder todifferent positions by limiting the return movement of rack O, andthereby stopping the return'revolution of cylinder B.

M is a locking device on the shaft of the type-cylinder. This deviceforms no part of the present invention, but is included in myapplication for patent filed December 29, 1886, Serial No. 187,011.

Fig. 2 shows a modification of the mode of pivoting the keyplate E,which consists in the employment of screw-threaded cone-points e, whichare tapped through the frame A and enter conical recesses in piecessecured to said key-plate. As these bearings wear, the conepoints can beset up. These adjustable pivotal bearings 6 may be located at anydesired distance from the front edge of the key-plate. The spring 0*,the weight Y, and lever X are omitted and a spring, y, substituted. Thespring 31' connects the front edge of the keyplate to a part of theframe of the machine. The key-plate E moves the type-wheel each timethat a collared key is depressed upon it. The key-plate has the specialfunction of actuating the type-cylinder, and the latter returnsautomatically to its normal position, the weighted lever X and thespring a returning it by their united action. When the describedmodification K is used, the type-cylinder is returned by the spring 3/.

Having described my invention, I claim- 1. The combination of thekey-plate having its front edge pivoted upon the frame of the machine,the weighted lever connected with and counterpoising said frame, thetype cylinder or segment having its shaft journaled in the frame of themachine, the pinion on said shaft, the segmental rack meshing therewithand made on the arc of a circle described from its pivotal point, andthe link-bar connecting the vibrator with an arm extending from thesegmental rack adjacent to its pivotal joint, so as torotate thetypecylinder when the key plate is depressed.

, 2. The combination of the key-plate, the lever pivoted upon the mainframe of themachine, having the end of one arm pivoted on the key-plateand an adj ustable weight on the other arm, the keys actuating thekey-plate and having their collared stems passing through theperforations thereof, the segmental rack having the end of one armconnected by a link-bar with the key-plate and the end of an oppositearm connected by .a

spring to the frame of the machine, the typecylinder, and the pinion onthe type-cylinder shaft arranged to mesh with the segmental rack,substantially as specified.

3. The combination of the key-plate, the

segmental rack connected therewith, the pinion on the type-cylindershaft, the type-cylinder, the buffer secured to the main frame,1and

the adjusting-screw passing through alug onv the frame of the segmentalrack and having its end in position to abut against'said buffer and holdthe type-cylinder in proper position weight Y, and the key F, allconstructed and when at rest, substantially as specified. arrangedsubstantially as shown, and for the 4. The combination of the main frameA, purpose described. provided with the pillar A, the typecylin- Intestimony that I claim the foregoing as 5 der B, having its shaftbearing on said pillar, my own I affix my signature in presence of 15the pinion b on the shaft of the type-cylintwo witnesses.

der, the-segmental rackframe 0, provided VIRGIL W. BLANOHARD. with thearms 0 0 the spring 0 the link-bar \Vitnesses: 0 the pivoted perforatedvibratory plate E, T. H. ALEXANDER,

10 the counterpoise-lever X, provided with the A. E. DOWELL.

